phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('8ba1a5c9b9b783ebd48b5f3388db4f04', -1, 1714257015, 1714257015, '0389ab79', -4, 0)

Line : 158
File : sessions.php